Work-feeding mechanism for shearing machines



Nov. 1-3, 1928., 1,691,264

A. J. BATES, JR

WORK FEEDING MECHANISM FOR sH'EARING MACHINES n et Otf.. 1l, 1926sgishet N5 I Y .13;5

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Nov. 1'3, 1928.

A. J. BATES, JR

WORK FEEDING MECHANISM FOR SHEARING MACHINES Filed oct. 11, 192s 8shetslsheet' 2 III l E Nov.13;1928, l 1,691,264

' A. J. BATES,'JR

WORK FEDING MECHANISM FOR SHEARING MACHINES Filed Oct. ll, 1926 8Sheets-Sheet 5 MjfM/L fw M. l@ Z5 Nov. 13, 1928.

A. J. BATES, JR

WORK FEEDING MECHANISM FOR SHEARING MACHINES 8 beets-Sheet 4 Filed Oct.l1, 1926 Nov. 13, 1928. v

A. J.` BATES, JR

WORK FEEDING MECHANISM FOR SHEARING MACHINES 8 Sheets-Sheei 5 Filed ont.11, 19,26

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Nov. 13, 1928.

`A. J. BATES. JR

WORK FEEDING MECHANISM FOR SHEARING MACHINES 8 Sheets-'Shet 6 Filed oct.11, 1926 s sneeslshei v m Ww i W l w n Wow m n. x 2 WWW m A. J. BATES.JR

' WORK FEEDING MECuHANISM FOR SHEARING' MACHINES Filed oct.'11, 192e Treo o I, om rnJ// jfl] ...IWIIIIIiIIINHHHJ f e o o 6 2 /M //.v n m y .7/N/ Nov. 13, 1928.

Nov. 13, 1928.

A. J. BATES, JR

WORK FEDIG MEGHANISM FOR SHARING MACHINES Filed Oct. 11, 1926 8Sheets-Shed 9 Patented Nw. 1a, 192s.

UITED STATI-:s

ALBERT ir. BATES, Ja.,- or cnIcAeo, ILLINoIs, AssIGNoa 'reruns mANnsnsra-EL TRUss co., or EAsr cnrcAso, INDIANA,- 'A coaroaArIoN or DELAWARE.

WORX-FEEDING IEGHANISM FOR SHRING MACHINES.

Application med october 11, 1926. Serial No. 140,787.

The invention relates to reciprocatory machines forshearing metal beamsand bars. In the fabrication of expanded trussed structurcs from beamsor bars, it is necessary to provide intermittent feed mechanism for thework which is adapted for beams of maximum length and it is desirablethat the machine should be adapted to properly shear slits in beams ofshorter lengths. It is also desirable that the operation of the machinebe variable to shear slits of different lengths in the beams accordingto the length of the strands and expansion desired in. the expandedstructures., A machine of this t pe is set forth in an application filedby me ovember 5, 1926, Serial No. 146,332.J

- In the operation (tf said machine, a toothed feed bar is used which isapproximately, or

at least as long, as' the length of the beam 520 being sheared', which,in some instances is of great length. For feeding the work for slits ofdifferent lengths, it is necessary to provide bars with di'erentlyIspaced. or numbered teeth so as to' feed the work according to thenumber off slashes used in forming the Aslits and according to thewidth. of the bonds left between/the slits. This makes it necessary toprovide a different fesed bar of the maximum length of the work for eachdif- .30 ferent product which requires diiierent spacing of the slashes.

The object of the present invention is to provide improved feedmechanism for the work which comprises a comparatively short` feed barto save the cost of producing and handling long bars. v

lOther objects will appear from the detailed description. 'i j Theinvention consists in the several novel `features hereinafter set forthand more particularly defined by the claims at the conclusion hereof.

In the drawings: Fig. 1 is a front 4View of the portion of a machineadjacent the shear mechanisms. the end of the machine from which thebeams ,are fed. Fig. 3 is a plan of the feed carriage and coactingparts. Fig. 4 is a View, partly in section andpartly. in front elevatlonof the feed-carriage and its associated parts. Fig. 5 is a section online 5-5of Fig. 2. Fig. 5 is a section on line 5**-5a of Fig. 3. Fig. 5bis a section on line 5"--5b of Fig. 4. Figs. 5 and 54 are front and rearperspectives of Fig. 2 is a front elevation ofl the work-feed carriage,respectively. Fig. 6 is a transverse section, showing one of theshearing mechanisms. Fig. 6'* is a section on hne 6-6L of Fig. 6. Fi 6"is a section of the operating connection or one of the shear mechanisms.Fig. 6 is a transverse section on'hne 6--6c of Fig. 1, showing the mechamsm for operating the intermittent workfeed. .Fig. 6d is a section online tid-6 of Fig. 6c. Fig. 7 is a diagrammatic lan, showlng a beam tobe cut, the shearing lades, one fof the toothed controller or feed barsfor the carriage and the dogs which coact with the teeth of said barbefore' the beamv-has been sheared. Fig. 7 is a similar diagram.lllustrating the arts after the machine has commenced to slit the beam.Fig.` 7b is a detail showing the manner in which the beam j isto beslitted, preparatory to its expansion. F1 7c 1s a erspective of' one ofthe contro 1ers for t e throw-out devices.

The invention is exempliiied in a machine for shearing the worka beam Fwith a.

web f and fianges fz-with three series of slits to form a doubleexpanded structure which comprises, mechanism A for shearin a serles ofslits a adjacent one flange o the beam; mechanism A2 for shearing acentral series of slits a in the web; mechanism A for shearing theseriesof slits a2 adjacent the other flan e of the beam; mechanism B forresetting t e deflected metal adjacent the slashes; and feed mechanismfor intermit-l tently advancing the work step-by-step through theshearing and resetting mechanlsms.

. The supportingstructure of the machine comprises a bed (Fig. 1) onwhich the carriages for the shearin and resetting mechanisms aremounted; a ame for supporting the devices which guide the work to theshearing mechanisms, composed of channel beams D (Figs. 5* and 5b). andsup orting brackets d, d', d2 and d on which t e Abeams D are {ixedlysecured; and a frame for supporting the' devices which guide the beamafter it has been cut, composed of channel beams E (Figs.

1 and 3) and brackets e, e to which said beams t are fixedly secured.

The beam F, exemplifying the work to be sheared, is guided and supportedin transit to the shearing mechanisms bya series of horizontallyextending rollers on which the lower edges of .the flanges cfg the beamF are ioo adapted to ride. Each of said rollers (Figs. 2 and 5) iscarried by a cross-shaft g* which is mounted in a pair of bell-cranklevers g5 which are fulcrumed on a shaft at g6 in the frame-beams D.Each of these levers has one ofv its arms extending downwardly. Thelower ends of all of said levers at either side are pivoted at g7 to abar g8. One end of one of'said bars g8 is adjustably connected andsecured by means of a bolt g" to a plate glo. Holes gu permit the bar g8to be shifted longitudinally to simultaneously raise or lower all of therollers for support-ing the beam F in transit to the shearing mechanism.Bar g8 is provided with two relatively offset holes g, and the plate g1@is provided with two relatively staggered series of holes, so that therollers may be adjusted accurately into the desired position fordifferent beams which are to be cut. Similarly mounted and adjustablerollers z' (only one of which is shown) are supported by ybell-cranklevers 2 which are fulcrumed in the beams E to adjustablv support thebeam after it has been sheare The shearing mechanism A is supported by astationary carriage a4, and each of the shearing mechanisms A', A2 issupported in a carriagea5 which is adjustable longitudinally of thework. Each carriage a5 is longitudinally adjustable on the bed C so thatthe shearing mechanisms A', A2 may be adjusted relatively to themechanism A and relatively to each other to position them for shearingthe initial slashes of slits of diferent lengths, so they will be spacedapart longitudinally to relatively position the slits according to thelength of the strands and the expansion desired in the finished beams.The carriages a5 are each mounted to slide longitudinally on tracks orguides or30 formed in a plate c (Fig. 6) which is anchored to the bed C.Bolts a extend through each of said carriages and their heads areadapted to slide in longitudinal ways (L32 in plate c. When the boltsare tightened, they serve to hold the carriages in assigned positionsand when loose permit them to be shifted. Each carriage al5 is adaptedto be readily shifted by gearing comprising a cross-shaft 02 journalledin bearings c3 on the carriage, a pinion c* rotatable by said shaft .andmeshing with a gear c5 which is fixed to a shaft c which is journalledin bearings c7 mounted on the carriage, and pinions c8 fixed to theouter ends of shaft c and meshing with longitudinal racks c which arefixed to and housed in angle bars 010 which are fixed to the plate c.

`Each shaft c2 may be turned by a wrench or crank to shift the carriagelongitudinally of the work in either direction. This exemplifiesmechanism for shifting two of the shearing mechanisms, so the spacingbetween them may be varied according to the longitudinal spacing betweenthe beginning of the slits. The shearing mechanisms A, A and A2 aresimilar in construction so that a description 'of one is applicable toall.

` Each of said mechanisms comprises a stationary shear-blade a6 and'reciprocable shear-blade all. Blade a is removably held and clampedbetween a plate a and the vertical wall as of a bed a1". Movableshearblade an is removably clamped to a head au by a plate an. The heada for the reciprocable shear-blade au is fulcrumed in a shaft a at theback of the carriage. The coacting shear blades are adjustabletransversely so that they may be set for different transverse spacingsto vary the width of the strands, when desired for shearing differentwork. For this purpose, each bed alo for the stationary shear-blades a6is slidably mounted on its carriage and may be so adjusted by a screw alwhich extends through a bracket a" on the carriage and is threaded to adepending lug als onsaid bed.' Bolts a1 extend through slots in the beda1,o to lock the bed in its adjusted position. A screw @2 s provided toadjust the carriage backwardly to its desired position. To permit themovable cutter-head a to be correspondingly adf justed to keep itscutting edge coactively positioned with respect to blade a6, itsfulcrum-'shaft a15 is mounted in a pair of suspension links a which archung from a pivot L22 which is stationarily supported in its associatedcarriage. Links a21 are pivotedv to swing transversely to the line oftravel of the work and to be adjusted by a screw a which passes througha block 0L241 which is pivoted in the lower end of links a21 and has anut to limit the backward movement of the fulcrum links and a set screw(L25 which extends through a block am which is secured to the lugs onthe lower ends of links a and forces the'links backwardly against thenut on screw a to lock the links L21 in their assigned position. Ananvil a, supports the metal to limit its deflection' by the blade alland permits the said blade to shear and bend the metal between the anviland the stationary shear-blade. This anvil is mounted on the bed a8 andis transversely adjustable with the shear-blade a. This exemplifies apair of coacting stationary and reciprocable shear-blades which areadjustable transversely to the line of travel of the work to permit themto be adjusted for different spacings bet-Wren the slits and forslitting different portions of the webs of beams.

In transit through the shearing and resetting mechanisms, the web of thebeam being operated upon is supported vertically by the stationaryshear-blades and the supports a and the anvil o the resetting mechanism.Transversely, the work i's guided by the bars h between which the workpasses. The bars 7L are held against spreading by front and rearabutment-heads k2, one pair of which lim front head h is threaded to ascrew h2? which is threaded to the associated carriage,- to limit theforward movement of the front bar h. The rear'head 11.2 is similarlythreaded and held by a screw h, the rear end of which is provided with a-fork 4h5 to hold said screw against rotation. The rear headh issupported by an arm h2 which is ivoted to one of the carriages a4, a5and is yi dingl; held to press the rear bar lz. against'the vvor by aspring km which is around an eye-bolt hm hung on the carriage. Nuts11.2* on said bolt may be adjusted to vary the force of the spring. Y

The mechanism for driving'and operating the movable cutter-beadscomprises an electric motor K suitably mounted on the carriage a* of theshearing mechanism A; a inion la. on the shaft of the motor, a gear lizdriven by said pinion and fixed to a shaft l kg which is journalled inbracketsk* and k mounted en the carriage a4; a pinion c?, fixed to ashaft k", a gear k7 driven by .pinion k, anda longitudinally extendingshaft los, to which gear k7 is fixed, which extends through thecarriages for, and drives all of, the shearmechanisms. An eccentric k1is drivably and fixedly connected to the shaft les by a key it andoperates the shear-mechanism A, and is confined in theforked upperportion of the carriage a4 and journalled in bearings Ic fixed 1n saidcarriage.. An eccentric k1 is similarly mounted in each. of thecarriages a5 for the shear-mechanisms A and A2', and

shaft las is connected to drive them by keys which are adapted to slidein a longitudinal key-way k12 in said shaft so that-the shearmechanismsA and Az will be driven by said shaft and so as to permit the carriagesa5 for the shear mechanisms A and A2 to be adjusted relatively to eachother and to maintain the driving relation between shaft ks and theeecentrices for said mechanisms in all positions of the carriages. Eacheccentric 7c operates a link k which is connected to one of the headsa12 of the movable shearblades to impart a reciprocatory motion to saidblade.

In shearing beams for joists or other struc tural steel, it is sometimesdesired to control the operation of the movable shear-blades to leavepredetermined portions of the beam un- .sheared For example, in theformation of expanded metal joists, it is advantageous to omit the topand bottom slits adjacent the ends of thebeal'n and to form only thecentral slit -A (Fig. 7b), so that the terminals of the flanges of thebeam will be left with the Webs thereon of greater Width than theWebportions in the meshes to reinforce .the end l portions of thejoists. For this purpose, variable means are provided to render each ofthe shear mechanisms A, A inoperative when desired. Each link In carriesan abutment block Z which is fixed to a pin Z which is piv-` ofed inlugs Z2 on the head a" 'and slidablc vertically inslots Z.` Normally,this abutment block engages a shoe Z3 which is fixedly held in a. slotin the end of link la. When theabutment block Z is swung forwardly toThe mechanism for intermittently feeding the work to the shearingmechanisms comprises a. carriage N which shifts an inwardly extendingpusher-arm n adapted to engage one flange ,f2 ofthe I-beam F andfingers-.71 to strad le the web of the beam, so that said beam will beadvanced by the carriage. The pusher arm n is pivoted at n2 to a plate nso that lit may be raised or lowered to bring the fingers n in positionto 'straddle'the web f of the beam F. A stop n limits the downwardpivotal movement of the finger n. The pivot n2 for arm n is fixed to aplate n which is connected to the carriage N by means of bolt-s n and-slots n" Whichpermit the plate and the arm to ,be adjusted transverselyof flanges of beams of di erent Awidths or heights. This carriage uidedto travel longitudinallyof the work y an angle bar n which is fixed tothe top of the front frame beams D and E and extends across the gapbetween the said frame beams to form a4 track for the carriage N. Thiscarriage is provided with a pair of forward rollers n* and a pair ofrear rollers n adapted to ride against the front and rear faces of thevertical flange of track n2'. `The carriage comprises a frame N whichstraddles and is supported on the track n2 and a flat bar or-plate nwhich is secured thereto. Said plate n."- extends longitudinally inadvance of the carriage, and angle beams 'n.10 and n are secured to andreinforce the projecting portions of said plate which is slidablysupported on the track'n. This forms a carriage-structure which isapproximately as v the work to bring it into osition to engage long asthe longest beam to lbe out, so that devices for controlling theoperation of the shearing mechanlsms, to leave unsllt portions adjacentits ends 'when desired, may be vcorrectly positioned for that purposeand supf' ported on and to move with the carriage.` The carriage-frame Nis extended to the front of the machine anddownwardly, as at N2. A f

longitudinally extending holder *als is Secured to said extension and isadapted to retain a. feed or charger bar M. This charger bar is formedwith several series of upstruck teeth m which are spaced apart accordingto the steps which the beam is to be advanced to cause the shear bladesto lap their res ective cuts to form elongated slits and in the desirednumber, according to the slashes necessary for slits to form strands ofthe desired length, and these series are spaced apart to leave thedesired bonds between the ends of the slits. This bar M-is removablyheld in holder als by studs 11.24 so the bars may be readily replaced sothat bars with different-ly spaced teeth for different work may beinserted into the holder. l

Coacting with the 'feed or charger bar are a series'ot' pivoted dogs P.each of which is mounted in a block P. These blocks are independentlyadjustable longitudinally of the machine, each being secured by setscrews P2 (Fig. 5) to the top flange of an I-beam P3 which is slidablymounted in brackets P4 which are bolted to the, front frame-beams D andE. A sui'licientnumber of dogs P are provided so that a comparativelyshort charger or feed-bar M will be constantly and successively incoacting relation with a sufficient number of-them to cause it toadvance thefeed carriage N, regardless of the length of the work and tofeed a beam of maximum length through the shearing mechanisms. Byadjusting the blocks P along the bar P3, the dogs `P may be. positionedso they will be correctly located to eoact with differently spaced teethon a feed-bar.

The beam or bar P3, with the entire series of dogs P mounted thereon, isreciprocated a distance in eXcessof the spacing between the teeth m ofthe charger or feed-bar M, so that between the reciprocations of theshearblades, some of the dogs P will engage the teeth of the bar M andalternately advance the feed-carriage a series of short strokes forvshearing and a long stroke so the shear blades will ski and leave bondsbetween the slits. By emp oying a comparatively short feed or chargerbar M, and providing a series of dogs suiiicient in number to feed thecarriage the full length of the beam, it becomes possible to use acomparatively short feedV or charger bar. In a shearing machine which isadjustable for cutting slits of diiferentflengths and for differentlongitudinal spacings, it is necessary that the charger bar be providedwith teeth according to the number of slashes neeessary to forni eachslit and according to said spacing. Resultantly, it is necessary toprovide different charger bars for these different operations. and bymaking it possible to use a comparatively short bar` a considerablesaving in cost of producing and handling these bars is effected.

The mechanism for reciprocating the bar P"s comprises a wrist-pin m2which is operated by a collar m3 (,Fig. 6) which is fixed to one end of,and rotates continuously with, the shaft c which operates the shearingand resetting mechanisms; a block m4 on said pin and slidable in a waym5' formed in the front4 end of a lever mfs which is pivoted on a stud.m7 which is supported on the carriage a* of the shearing mechanism A; acomposite link m8 pivoted at m9 to the rear end of lever m and at m10 toa rocker arm m which is provided at m12 to said carriage va'link m13pivoted at mi to arm m11 and at m15 to an arm ml';"'a'transverse shaftm17 mounted in bearings m on carriage a4 and keyed to arm m1G an arm m1keyed to the front end of. shaft m17; a link m20 pivoted by pin m21` toarm m19; a rocker lever m22 (Fig. 1) fulcrumed at m23 to bracket'e andto the lower end of which link m20 is pivoted and a link connectionbetween the, upper end of lever m22 and the reciprocatory dog carryingbar pf. The pivot pin m21 between the link m20 and arm m1 is adjustableto and from the axis of shaft m17 to permit the stroke imparted to thebar p3 to be varied for different work, and for this purpose pin m21extends through a slot m28 in arm m19 and is provided with a nut b whichit may be secured in its assigned position.

The connection between lever m22 and the bar p3 comprises a two-partlink m24l having its ends pivoted to said lever and bar respectively anda cushion spring` m25 between said parts, so that if the feed mechanismshould be somewhat out of synchronism with the idle cycleof theshear-blades, the connection will yield, so the work will not be feduntil it is free. The lever m28 comprises a pivoted member mm held by apin mm which will shear when subjected to excessive stresses and preventbreakage.

To permit the carriage to be retracted after the shearing of a beam hasbeen completed, a release bar R has its ends coaxially pivoted, as at1', to the carriage N.- Bar R isnormally positioned, as shown by fulllines in Fig. 5 of the drawings, and when swun into horizontal position,shown by dotted mes, it will simultaneously depress'the tails p20-of thedogs P which are in engagement with the charger bar and successivelydepress the remaining do s as the carriage is retracted, so the dogsw1ll be free from the charger-bar during the retractile movements of thecarriage to bring it into its starting position.

To automatically and individually control the cutting operation of theshear mechanisms A and A', to selectively render them inoperative andleave unslitted portions adjacent the ends of the beam, as shown at theright of Fig. 7b, the carriage N has secured thereto devices O foroperating the arms ll5 of the throw-out devices for the movable cuttersof mechanisms A and A', which are adpoint to said bars n", n by a bolto, and the to strike the lower end of a lever 07 which is pivoted to abracket o" which is fixed to one of the carriages of theshear-mechanisms A, A. Lever 07 comprises an arm 012 which is connectedt'o and pulls a chain 01 which is guided on a shcave o11 mounted on saidbracket and connected to an arm Z5. As a result, when a member 05strikes the lever o i'n the forward ,movement of the carriage N, thelever will4 operate the chain 01 to rock the shaft Z and swing theabutment Z out of the shoe Z3, so that the pin Z carried b the operatinghead cl2 will not be operate to force the shearblade all into or throughthe beam beingsheared. Lever 0"is free to swing to the leftindependently of the chain 01, so that when the carriage is retractedafter a beam has been sheared, the throw-out devices will not beoperated. The arms o7 of the shearing mechanisms A and A respectivelyare attached to the inner and outer sides of the bar 02, so that each ofthe controlling clamps will operate one ot' the throw-out levers o7 andclear the other. By adjusting the throw-out devices along the bars 02,o, they may be set to control the shearing mechanisms A, A to leaveintact portions in beamsot different lengths or at different portionsofthe beams. This exemplifies mechanism for automatically controllingthe shearing mechanism to render the shear-blades inoperative atpredetermined points where it is desired to omit the slit,-

such as at the' upper and lower slits of a beam used to Jform anexpanded trussed joist.

rlhe friction between the bars n10 and n and the vertical liange of thetrack n2 is suficient to prevent retraction of the carriage. To aid theoperator in retracting the carriage N after the cuttingof a beam hasbeen completed, a cable S is provided with a hook. s which is adapted toengage the plate n2 of the carriage. rlfhis cable is guided by a pulleys2 which isr carried by an arm sa fixed to the bracket la of thecarriage a4 of the shearing mechanism A and extends around an overheadlsheave (not shown) and has attached thereto a weight.

Assuming the beams to be sheared, preparatory to expansion, are of agiven size or shape, the shear mechanisms A', A2 are set in longitudinalrelation to each other, according to the length of the slits desired forthat work. The carriages a5 for the shear mechaj nismsA, A2 may bereadily adjusted by turning the shafts c, The cutter-heads. 0512 forreciprocatingshear blades a and the beds am for the stationaryshear-blades a6 and anvil a@ are also adjusted transversely so the slitswill be spacedtransversely from one anlot-her as desired, according tothe width of the strands desiredin the work, and to retain the shea-rbladesof each mechanism n i accurate coacting relation. V Rollers g areadjusted vertically to support the beam to be cut so its web will beguided between the shear-blades. Bars h will be adjust-ed to guide thework transversely through the shearing mechanisms. The rollers z forsupporting the sheared beam will be adjusted to bring them into thepla-ne of the lower edges of the flanges of the work. A suitablefeed-bar M, formed with a series of .teeth m and spaces m40, tocorrespond to the number of slashes required for each slit of thedesired length and the spacing between the slits, to form bonds, will beplaced in the holder als of the carriage N, and the-latter will beplaced in its retracted position so the rear end of the beam may beplaced in front of the pusher arm n with its web betweenv lingers ln.The stroke of the arm m moving bar P8 may be adjusted by the adjust-mentof pin m21 in the arm m19 to impart to said bar strokes required. forthe work. This stroke is sufficient to impart to the work the longerstroke required in formin the bonds between the slits, which stroke sustantially equals the widt-h of cutter plus the bond. The dogs on thebar P2 idle in their advancing movements distances equal to the longstroke and the short stroke required for the shearing strokes. Inpractice, the operative strokes of the work will be such as to cause theslashes to overlap or connect to form continuous slits of the desiredlength. In setting the shearmechanisms longitudinally, they are adjustedso all of the mechanisms, wil simultaneouslyv start and finish the slitsafter the work has reached the mechanism A2. If some of the slits are tobe omitted adjacent the ends of the beam, the controller devices O areset in proper position on the carriage to cause them 'to throw out theshear mechanisms A and A at periods l eration will be continued untilthe entire beam has been sheared throughout its length. The vfeed barcarried thereby will pass successively into operative range of thesucceeding dogs Pon the reciprocating bar Psvuntil the entire beam hasbeen operated on. lThe carriage N will be retracted after each operationinte position to commence to feed'the next beam.

The resetting mechanism B is of the construction set forth in myaforesaid application No. 146,332. Theinvention exemplifies areciprocatory machine for shearing beams which is adapted to be adjustedfor beams of different sizes, shapes or lengths and in which the beam isautomatically fed bymechanism which comprises a feed or charger barwhich is comparatively short` and shorter than the work so thatl it isunnecessary to provide a large number of charger bars of a lengthapproximately equivalent to the maximumlength of the beams to be cut foruse in shearing different Work. v

The invention is not to be understood as restricted to the details setforth, since these may be modified Within the scope of the appendedclaims, without departing from the spirit and scope of the invention.

Having thus described the invention, what -I claim as new and desire tosecure by Letters Patent, is:

1. In a machine of the character described, the combination of shearingmechanisms for cutting metal beams 'or bars on different lines, eachcomprising a reciprocable Shearing element, mechanism for operatlng saidelements, and mechanism for intermittently feedin the work comprising afeed carriage, a toot ed bar shorter than the Work connected to thecarriage, and a series of progressively acting dogs for the bar.

2. In a machine of the character described, the combination of shearingmechanisms for cutting metal beams or bars on different lines, eachcomprising a reciprocable shearing element, mechanism for operating saidelements, and mechanism for intermittently feeding the work comprising afeed carriage, a toothed bar shorter than the Work connected to thecarriage, anda series of progressively acting dogs for the barsadjustable relatively to one another.

3. In a machine of the character described, the combination of shearingmechanisms for cutting metal beams or bars on different lines,

each comprising a reciprocable shearing element, mechanism for operatingsaid elements, and mechanism for intermittently feeding the Workcomprising a reciprocable carriage, a replaceable toothed bar shorterthan the Work connected to the carriage, and series of progressivelyacting dogs for the 4. In a machine of the character described,

- the combination of shearing mechanisms for cutting metal beams or barson different lines each comprising a reciprocable shearing element,mechanism for operating said ele.- ments, and mechanism forintermittently feeding the Work com rising a reciprocable feed carriage,a Vtoot ed bar shorter than the work mounted on the carriage, and aeries of dogs to progressively engage the 5. In a machine of thecharacter described,

the combination of shearing mechanisms for' cutting metal beams or barson different lines each comprising a reciprocable shearing element,mechanism for operating said elements, and mechanism for intermittentlylfeeding the work comprising a reciprocable feed carriage, a toothed barshorter than the Work replaceably mounted on the carriage, and a seriesof dogs to progressively engage the bar.

6. In a machine of the character described, the combination of shearingmechanisms for cutting metal beams or bars on different lines eachcomprising a reciprocable shearing element, mechanism for operating saidelements, and mechanism for intermittently feeding the Work comprising areciprocable feed carriage, a toothed bar shorter than the workreplaceabl mounted on the carriage, and a series of ogs progressivelyacting on the bar, adjustable relatively to one another.

7. In a machine of the character described, the combination of shearingmechanisms for cutting metal beams or bars on different lines eachcomprising a reciprocable shearing element, mechanism for operating-said elements, and mechanism for intermittently feeding the work comrising a reciprocable feed carriage, a remova le toothed bar shorterthan the wor-k mounted on the carriage, a series of dogs toprogressively engage the bar, and a variable stroke devicev foroperating said intermittent mechanism.

8. In'a machine of the character described, the combination of shearingmechanisms for cutting metal beams or bars on different lines eachcomprising a rcciprocable `shearing element, mechanism for operatingsaid elements, and mechanism for intermittently feeding the Workcomprising a reciprocable carriage, a vremovable toothed bar shorterthan the Work .mounted on the carriage, a series of ad'ustableprogressively acting dogs for the ar, and a variable stroke de Vice foroperating said intermittent mechanism.

9. In a machine of the character described, the combination of shearingmechanisms for cutting metal beams or bars on different lines eachcomprising a reciprocable shearing element, mechanism for operating.said elcnients, and mechanism for intermittently feeding the workcomprising a feed carriage,

-a toothed bar shorter than the work replaceably mounted on thecarriage, a series of progressively acting dogs forthe bar and mechanismfor reciprocating the dogs.

.10. In a, machine of the character described, the combination ofshearing mechanisms for cutting metal beams or hars on different lineseach comprising a recipr cable shearing element, mechanism for operatingsaid elements, and mechanism for intermittently feeding the workcomprising a carriage, a toot-hed bar shorter than the Work replaceablymounted on the carriage, a series of dogs to successively engage thetoothed bar, a bar on which the dogs are adjustably mounted, andmechanism for reciprocating the dog-bar.

11. In a machine of the character dcscribed, the combination of shearingmechries of adjustable progressively acting dogs anisms for cuttingmetal beams or bars on dii'erent lines each comprising. a reciprocableshearing element, mechanism for operating said elementmnd mechanism forintermittently feeding the Work comprising a carria e, a toothed barshorter than the Work rep aceably mounted on the carriage, a series ofdogs to progressively engage the bar, andmechanism with a variablestroke for reciprocating the dogs.

12. In a machine of the character described, the combinationofreciprocatory shearing mechanisms for cutting metal beams or bars ondifferent lines each comprising a pairof coacting shearing elements, themechanisms being spaced apart and adjustable longitudinally relativelyto each other, for shearing slits of different lengths and adjustabletransversely to vary the transverse spacinO between the slits, mechanismfor operating the shearing mechanisms and variable mechanism forintermittently feeding the Work so the elements will simultaneously cutconnected slashes to Aform elongated slits with bonds between themcomprising a replaceable toothed bar shorter than the Work and a seriesof progressively acting ydogs for the bar.

13. lIn a machine of the character described, the combination ofreciprocatory shearing mechanisms for cutting metal beams -or bars ondierent lines each comprising a for the bar.

14. In a machine of the character described, the combination ofreciprocatory shearing mechanisms for cutting metal beams or bars ondifferent lines each comprising a pair of' coacting shearing elements,the mechanisms being spaced apart and adjustable longitudinallyrelatively to each other, for

shearing slits of dierentlengths and adjustable transversely to vary thetransverse spacing between the slits, mechanism for operating theshearingl mechanisms, and variable mechanismv for intermittently feedingthe Work so theelements Will approximately simultaneously cut connectedslashes to form elongated slits with bonds between them comprising areplaceable toothed bar shorter than .the work, a series ofprogressively acting dogs for the bar, and a variable stroke device foroperating the intermittent mechanism.

15. In a machine of the character de- `anisms being spaced apart andadjustable longitudinally relatively to each other, for shearing slitsof different lengths and adjustable transversely to vary the transversespacing between the slits, mechanism for operatmg the shearingmechanisms, mechanism for intermittently feeding the Work so theelements will approximately simultaneously cut connected slashes to formelongated slits with bonds between them, comprising a replaceabletoothed bar shorter than the Work, and a series of dogs to progressivelyengage the bar, and a device for disengaging the dogs and bar during thereturn of the carriage after a beam has been sheared.-4

16. In a machine of the character described, the combination of shearingmechanisms for cutting metal beams or bars on different lines eachcomprising a reciprocable shearing element, mechanism for operating`said elements, mechanism for intermittently feeding the Yivorkcomprising a carriage, ay toothed bar shorter than the work replaceablymounted on the carriage, a series of dogs to progressively engage thebar and mechanism for reciprocating the dogs, and a device, movalilymountedI on the carriage, for rendering 'the dogs inoperativeduringreturn of the carriage after a beam has been sheared.

17. In a machine of the character de-' scribed, the combination ofreciprocatory shearing mechanisms for cutting metal beams or bars ondifferent lines, eachcomprising coacting shearing elements, mechanismfor operating said shearing mechanisms, mechanism for intermittentlyfeedingthe Work longitudinally to the shearing mechanism comprising alongitudinally movable carriage, a toothed bar shorter than the workconnected to the carria e, and a series of progressively acting dogs orthe bar, and devices for rendering the shearing mechanisms ineffectivecomprising controller elements mounted on the carriage.

18. -In a machine of the character described, theA combination ofreciprocatory shearing mechanisms for cutting metal beams or bars ondifferent lines, each comprising coacting shearing elements, mechanismfor operating said shearing mechanisms, mechanism for intermittentlyfeeding the Work longitudinally to the shearing mechanismy comprising alongitudinally movable carriage, a toothed bar shorter than the workconnected to the carriage, anda series of progressively acting dogs forthe bar, and devices for rendering the shearing mechanisms ineffectiveOcomprising controller elements adjustably mounted on the carriage.

19. In a machine of the character described, the combination ofreciprocatory shearing mechanisms for'cutting metal beams or bars ondifferent lines, each comprising coacting shearing elements, mechanismfor operating said shearing mechanisms, and mechanism for intermittentlyfeeding the Work longitudinally to the shearing mechanism comprising alongitudinally movable carriage, a toothed bar shorter than the Workconnected to the carriage, and a series of progressively acting dogs forthe bar, and a yielding connection for operating the mtermittentImechanism.

20. In a machine of the character described, thc combination ofrcciprocatory shearingr mechanisms for cutting metal beams or bars ondifferent lines, each comprising coacting shearing elements, mechanismfor operating said shearing mechanisms, and mechanism for intermittentlyfeeding the Work longitudinally to the shearing mechanism comprising alongitudinally movable carriage, a toothed bar shorter than the Workconnected to the carriage, and a series of pro gressively acting dogsfor the bar, and vertically adjustable means on the carriage for pushingthe Work.

.21. In a machine -of the character described, the combination ofreciprocatory shearing mechanisms for cutting metal beams or bars ondifferent lines, each comprising coacting shearing elements, mechanismfor operating said shearing mechanisms, and mechanism for intermittentlyfeeding the Work longitudinally to the shearing mechanism comprising alongitudinally movable carriage, a toothed bar shorter than the Workconnected to the carriage, and a series of progressively acting dogs forthe bar, and laterally adjustable means on the carriage for pushing theWork.

22. In a machine of the character described, the combination ofreciprocatory carriage, a toothed bar shorter than the Work,

connected to the carriage, and a series of progressively acting dogs forthe bar, and vertically and laterally adjustable means on the carriagefor pushing the Work.

23. In a machine of the character described, the combination ofreciprocatory shearing mechanisms for cutting metal beams or bars ondierent lines, each comprising coacting shearing elements, mechanism foroperating said shearing mechanisms, and mechanism for intermittentlyfeeding the Work longitudinally to the shearing mechanism comprising alongitudinally movable carriage, a replaceable toothed bar shorter thanthe Work onl the carriage and a series of progressively acting dogs forthe barhand verticall and laterally adjustable means on the carriage forpushing the Work.

Signed at East Chicago, Indiana, this 23rd day ofSeptember, 1926.

ALBERT J. BATES, JR.

